1) Your callback for the toggled signal is of the wrong function
prototype.
"toggled" void user_function (GtkToggleButton *togglebutton,
gpointer user_data);
So, get rid of the GdkEvent* parameter, as it's not used by this type
of signal handler.
2)You are connecting cb_toggle()
before label has been created. So, you are not passing
what you think you're passing. You shouldn't connect
the signal until the label is created.
Hope that helps.
Donna
----- Original Message -----
From: B Mohrgan Pratten <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, March 15, 2000 6:03 PM
Subject: [gtk-list] Why doesn't it work ??
> I am vary new to gtk, but like what I have seen,.
>
> I have a question with source code. >
----------------------------------------------------------------------------
----
> #include <gtk/gtk.h>
>
> void cb_toggle (GtkWidget*, GdkEvent*, GtkWidget*);
> void cb_exit (GtkWidget*, GdkEvent*, gpointer);
> int main (int, char**);
>
> void cb_toggle (widget, event, label)
> GtkWidget *widget;
> GdkEvent *event;
> GtkWidget *label;
> {
> gtk_label_set_text (GTK_LABEL (label), "DOWN");
> }
>
> void cb_exit (widget, event, data)
> GtkWidget *widget;
> GdkEvent *event;
> gpointer data;
> {
> gtk_main_quit ();
> }
>
> int main (num, str)
> int num;
> char **str;
> {
> GtkWidget *window;
> GtkWidget *toggle;
> GtkWidget *label;
>
> gtk_init (&num, &str);
>
> window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
> gtk_signal_connect (GTK_OBJECT (window), "delete_event",
> GTK_SIGNAL_FUNC (cb_exit), NULL);
>
> toggle = gtk_toggle_button_new ();
> gtk_container_add (GTK_CONTAINER (window), toggle);
> gtk_signal_connect (GTK_OBJECT (toggle), "toggled",
> GTK_SIGNAL_FUNC (cb_toggle), label);
> gtk_widget_show (toggle);
>
> label = gtk_label_new ("UP");
> gtk_container_add (GTK_CONTAINER (toggle), label);
> gtk_widget_show (label);
>
> gtk_widget_show (window);
>
> gtk_main ();
>
> return (0);
> }
>
>
>
>
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